Hip dysplasia leads to premature osteoarthritis of the hip and accounts for many of total hip replacements in patients. The early diagnosis is extremely important and is based mainly on the radiological findings. In a radiographs correctly performed measurements of Indexes like the Hip Value (HV), Acetabular Index (AI), or the Acetabular Index of the Weight-Bearing Zone (AIW) , the Center-Edge (CE), the Acetabular Depth-Width Ratio (ADR), the femoral head extrusion index or Reimer Index (RI), the Congruity Index (CI), the Sharp’s angle (SA), Tonnis grade of dislocation (TG), Congruence Index (CG) and the Acetabular Center Margin angle (ACM) are important for an the orthopaedic surgeon who wants objectively to asses and monitor optimally on standard radiographs the hips. These measurements usually performed in one X-ray by the traditional way which is time-consuming and cumbersome. The main concern of the orthopedic surgeon especially those treating the dysplastic hip are to improve the biomechanical status of the joint. To accomplish this, the surgeon must be familiar with the biomechanics of the hip. Because of the complexity of biomechanical analysis (trigonometric functions, etc.) is almost impossible to calculate in everyday settings, forces acting on the hip, the directions in which they act, and the associated stresses that develop within the joint. With measurements by the App and having numerical data it is possible to evaluate the efficacy or even predict it of the various procedures not on the basis of experience any more .A useful sensitive tool also to identify normal hip joints as having potential prearthritic tendency.
We offer this new app, in which simply by marking certain anatomical landmarks at each hip you measure in an instant, all these indexes. The app also compares the results with normal age, gender and side specific reference databases retrieved from the international literature. Geometric parameters are also taken into account and weight-bearing contact surface, load (R) and stress (P) on the measured hip are being calculated.